Royalty and celebrities which favors the rare blue diamonds across the ages, now stands a chance to grab an exquisite blue diamond ring that epitomizes that ‘golden era’ of elegant simplicity at the Bonhams Fine Jewelry sale on 24th April 2013. This extremely rare and fancy deep-blue diamond is set in a ‘Trombino’ ring circa 1965 made by Bulgari, the world-acclaimed Italian jeweler favored by Hollywood film stars, and the epitome of design fashion and innovation during the 1960s. However, it’s interesting to note that blue diamonds are very rarely seen on the market and the sought-after

Structurally very pure, the blue diamonds account for less than 1% of all diamonds mined. And, the stunning color blue is derived from small atoms of boron mixing with the carbon atoms in a diamond, affecting the absorption of light passing through the stone and lending it a blue appearance.

Weighing 5.3 carats, the fancy deep-blue diamond set into a 1965 Bulgari ring, will sell for an estimated price of $1.5-2.3m.